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It's a Legitimate Strategy Get 3 Kills while defending an Objective Zone without leaving it

Hazard Course Complete the Tutorial

Make Them Count Kill 100 enemies with headshots.
100/100

Installation 04 Complete Halo.

Welcome to 'Nam Kill your first enemy
1/1

The Autumn Leaves Complete Pillar of Autumn.

Cranial Collect a Skull.

Sacrifice Ensure your squad escapes safely from Cuba.

Death to Dictators Take down Castro with a headshot.

One Giant Leap In Moon, become trapped in the Receiving Area and free yourself through resurrection in co-op.

Big Bang Theory In Moon, gain sweet, sweet, revenge.

Cryogenic Slumber Party In Moon, complete Richtofen's grand scheme.

Time Travel Will Tell In Shangri-La, acquire the focusing stone.

Ensemble Cast In Call of the Dead, send the crew to Paradise in co-op.

Welcome to the Penthouse Prestige once in multiplayer Public Match.

Ground Control In Moon, prevent each excavator from breaching the base in one game.

Kung Fu Grip In Origins, free yourself and another from the Panzer Soldat’s claw in one game.

Master of Disguise In Origins, use Zombie Blood to revive three players and activate a generator in one game.

Little Lost Girl In Origins, release Samantha.

Fully Armed and Operational In Moon, acquire 3 pack-a-punched weapons at the same time.

Perks in Spaaaaace! In Moon, purchase every perk in one game.

One Small Hack for a Man... In Moon, hack something.

Small Consolation In Shangri-La, use the 31-79 JGb215 on each type of zombie.

Zomb Disposal In Shangri-La, dispose of a Napalm zombie without it harming any players.

Blinded By the Fright In Shangri-La, kill a Shrieker zombie while blinded by it.

Monkey See, Monkey Don't In Shangri-La, get something from the monkeys.

Stand-in In Call of the Dead, send the crew to Paradise in solo or co-op.

Stuntman In Call of the Dead, make a zombie explode using the V-R11.

They are going THROUGH! In Ascension, kill at least 5 zombies with 1 Gersh Device.

Chimp on the barbie In Ascension, kill a space monkey with a fire trap.

Space Race In Ascension, Pack-a-Punch a weapon before round 8.

The eagle has landers In Ascension, escape on all 3 lunar landers.

See Me, Stab Me, Heal Me Fire a Pack-a-Punched Ballistic Knife at a downed ally to revive them from a distance.

Sacrificial Lamb Shoot at or be shot by an ally with a Pack-a-Punch crossbow and kill six zombies with the explosion.

Hands Off the Merchandise Kill the Pentagon thief before it can steal your load-out.

The Collector Buy every weapon off the walls in a single Zombies game.

Easy Rhino In Dead Ops Arcade, use a Speed Boost to blast through 20 or more enemies at one time.

Insert Coin Access the terminal and battle the forces of the Cosmic Silverback in Dead Ops Arcade.

Overachiever In Origins, complete all 4 Challenges in one game.

Saving the Day...All Day In Origins, revive another player four different ways in one game.

I’m on a Tank! In Origins, ride the tank around the map without getting off.

Mined Games In Buried, be their pawn.

Master Wizard In Origins, wield all of the ultimate staffs in one game.

Playing with Power In Origins, build all elemental staffs in one game.

All Your Base In Origins, activate all generators without allowing one to stop.

Not a Gold Digger In Origins, share a weapon you dug up.

Revisionist Historian In Buried, rewrite history.

Awaken the Gazebo In Buried, Pack-a-Punch a weapon during round 1 with no one using the bank or Weapon Locker.

Mazed and Confused In Buried, survive an entire round within the maze on round 20 or higher.

FSIRT Against the Wall In Buried, purchase the LSAT off the wall and Pack-a-Punch it.